Anti-falling wire plug-in terminal on PCB (printed circuit board)
By designing a structure including pad holes, connector devices and copper foil hole rings, the problem of wire shedding and plug-in confusion in the pad hole design of existing PCB boards is solved, and a standardized PCB package is realized, which improves the design speed and production efficiency, and ensures a stable connection between wire and PCB board.
Patent Information
- Application Number
- CN202420885602.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-26
AI Technical Summary
When the existing PCB board pad hole design meets the needs of convenient wire insertion and over-wave soldering, it is easy to cause wire shedding and plug-in confusion, and the design is not conducive to unified packaging management, increasing production costs and time.
A structure including a pad hole, a connecting device and a copper foil hole ring is designed. The upper end of the connecting device is rivet-pressedly connected to the wire core, the lower end is inserted into the pad hole and connected to the copper foil hole ring, the barb part extends obliquely to the side of the pad hole to prevent falling off, and the limit part is used to limit the insertion depth.
Through standardized connection device design, the unified design of pad holes is achieved, the design speed and production efficiency of PCB boards are improved, the cost of production and wire materials is reduced, and the stable connection between wire and PCB boards is ensured, and the falling off is prevented.
Smart Images
Figure CN222637815U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PCB boards, in particular to a wire material plug-in terminal on a PCB board that is prevented from falling off. Background Art
[0002] PCB will need to be connected to external wires. To facilitate the connection of wires, a terminal is usually installed on the PCB first, and the wires are connected through the terminal. Therefore, various pad hole designs often appear in PCB design. One of the designs is to design the pad hole according to the size of the wire number. The design of the pad hole must not only meet the convenience of wire insertion, but also meet the needs of wave soldering production. When designing the wire pad hole, the following methods are usually adopted:
[0003] 1. Design by wire size. This method is to design with reference to the size of the international wire size. According to the wire size, refer to the cross-sectional area of the bus core after stripping, calculate the diameter of the circle, and then increase the air gap between the tin and the plug-in based on the obtained diameter, generally by (0.2-0.4mm).
[0004] Second, design the diameter size after stripping and tinning according to the wire number. This method is to dip a layer of solder on the surface of the wire core again after stripping the wire to prevent the wire core from deforming and bending, and then increase the air gap between the tin and the plug-in based on the main core diameter after tinning, generally increasing (0.2-0.3mm).
[0005] 3. Design the diameter size after stripping the wire, tightening the wire core and dipping it in tin again. This method is to strip the wire and tighten the wire core, and then dip a layer of solder on the surface of the wire core to prevent the wire core from deforming and bending. Then, based on the diameter of the bus core after dipping in tin, increase the air gap between the tin and the plug-in, generally by (0.2-0.3mm).
[0006] The above structural designs have resulted in several different sizes of pad holes based on the same wire number. That is, the above methods are not conducive to the unified management of packaging, and increase the cost and time in the production process. In addition, it is easy to cause wire shedding during wave soldering and plug-in confusion during rework. Utility Model Content
[0007] In order to solve the above technical problems, the utility model provides a wire plug-in terminal on a PCB board that is anti-dropping.
[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0009] A wire plug-in terminal for preventing falling off on a PCB board comprises a pad hole arranged on the PCB board, a connecting device is arranged in the pad hole, a copper foil hole ring is arranged around the hole opening of the pad hole, the copper foil hole ring is connected to the circuit layer in the PCB board, the upper end of the connecting device is riveted and connected to the wire core of the wire into one body, the lower end of the connecting device is inserted into the pad hole and connected to the copper foil hole ring on the PCB board, the wire is electrically connected to the copper foil layer of the PCB board through the connecting device, and the lower end of the connecting device is provided with a barb portion, the barb portion extends obliquely to the side of the pad hole and contacts the surface of the PCB board.
[0010] As a further improvement, the copper foil hole ring is arranged on the bottom surface of the PCB board, and the lower end of the connecting device is inserted from the front side of the pad hole and extends to the bottom surface of the PCB board and then welded and fixed to the copper foil hole ring.
[0011] As a further improvement, the barb portion is arranged to be inclined outward from bottom to top from the side of the lower end of the connecting device.
[0012] As a further improvement, the barb portion and the connecting device are an integrally formed structure.
[0013] As a further improvement, the end of the barb portion is configured as an arc end.
[0014] As a further improvement, a laterally protruding limiting portion is provided at the upper end of the connecting device, and the limiting portion fits the front side of the PCB board, and the total width of the limiting portion and the connecting device is greater than the diameter of the pad hole.
[0015] As a further improvement, the limiting portion and the connecting device are an integrally formed structure.
[0016] As a further improvement, the limiting portion is a horizontal plate structure.
[0017] As a further improvement, the barb portion is in the shape of an annular ring wall.
[0018] As a further improvement, the lower end of the connecting device extends to a portion of the bottom surface of the PCB board, and the distance between the limiting portion and the lower end of the connecting device is greater than the depth of the pad hole.
[0019] Compared with the prior art, the utility model has the following beneficial technical effects:
[0020] By designing a separate connector, the size of the pad hole can be standardized, and the connector can also be manufactured in a standardized manner, thereby forming a standardized PCB package and improving the design speed of the PCB. Connectors can be produced automatically by wave soldering, which not only improves production efficiency and reduces production and wire material costs, but also can well meet the universal design requirements of PCB pad holes corresponding to various wire numbers.
[0021] The connector and the wire are connected together by riveting and pressing, and the assembly is firm. The barb of the connector supports the PCB board, which can prevent the connector from falling out of the pad hole when the PCB board is inverted, and the reliability is higher. The limiter can limit the depth of the connector inserted into the pad hole to prevent the connector from being inserted too far and affecting the use of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the top view structure of the utility model;
[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;
[0024] Figure 3 It is a schematic diagram of the structure of the connecting device in the utility model.
[0025] Reference numerals:
[0026] PCB board 1, wire material 2, insulation skin 21, wire core 22, connecting device 3, barb portion 31, limiting portion 32, copper pad hole 4, foil hole ring 5. DETAILED DESCRIPTION
[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0028] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] The PCB board targeted by the utility model can be a single-layer board structure or a multi-layer board structure, and is not limited to a PCB board with a specific number of layers. It is applicable to any structure where a soldering pad hole is set on the PCB board and needs to be connected to an external wire, forming a separate connecting device, standardized production, and no need to consider the diameter of the wire. A soldering pad hole with uniform specifications can be formed on the PCB board, thereby realizing standardized PCB packaging and improving efficiency. At the same time, the stability of the assembly of the connecting device and the PCB board is improved, and it is not easy to fall off, ensuring safety and reliability during use and transportation. There is no need to directly insert the wire core of the wire into the soldering pad hole in the traditional way.
[0031] Embodiment 1
[0032] refer to Figure 1-3 As shown, a wire plug-in terminal for preventing from falling off on a PCB board comprises a pad hole 4 provided on a PCB board 1, a connector 3 is installed in the pad hole 4, a copper foil hole ring 5 is provided around the hole of the pad hole 4, the copper foil hole ring 5 is connected to the circuit layer in the PCB board 1, and the upper end of the connector 3 is riveted and connected to the wire core 22 of the wire 2 to ensure the stability and reliability of the connection between the connector 3 and the wire 2. When connecting, it is necessary to first peel off the insulation skin 21 of a part of the wire 2 to expose the wire core 22 inside the wire 2, and rivet and fix the wire core 22 part to the upper end of the connector 3, and the wire core 33 and the connector 3 are electrically conductive while being fixed, so that there is no need to design how the wire core and the pad hole are adapted.
[0033] The lower end of the connector 3 is inserted into the pad hole 4 and connected to the copper foil hole ring 5 on the PCB board 1. The wire 2 is electrically connected to the copper foil layer of the PCB board 1 through the connector 3. The lower end of the connector 3 is provided with a barb 31, which extends obliquely to the side of the pad hole 4 and contacts the surface of the PCB board 1. The total width of the barb 31 and the part on the same horizontal line of the connector 3 is greater than the width of the pad hole 4. After the connector is assembled, the barb extends outside the pad hole, and then the barb is located outside the opening of the pad hole, so that it abuts against the surface of the PCB board to prevent it from falling off. The connector is made of metal and can play an electrical conduction role, transferring the electrical properties of the copper foil circuit of the PCB board to the wire.
[0034] The copper foil hole ring 5 is usually only provided on the bottom surface of the PCB board 1, i.e., the reverse side of the pad hole 4, and is provided in a circle around the hole opening of the pad hole. The copper foil hole ring is connected to the circuit layer of the PCB board to achieve electrical conduction. Therefore, the connecting device only needs to be welded and fixed to the copper foil hole ring to achieve electrical conduction with the PCB board.
[0035] During specific assembly, the lower end of the connector 3 is inserted from the front of the pad hole 4, that is, the installation starts from the front of the PCB board 1, and the lower end of the connector 3 extends into the pad hole 4 and then extends out of the pad hole. At this time, the lower end of the connector 3 is located on the bottom surface of the PCB board 1 and is welded and fixed to the copper foil hole ring 5 on the bottom surface of the PCB board 1. The barb part is a sheet structure. Since it is a metal material, it has a certain elasticity. When the lower end of the connector is inserted into the pad hole, the barb part is squeezed and shrinks toward the connector. When the lower end of the connector extends out of the pad hole, the barb part resets and expands outward, thereby abutting against the outer side of the bottom surface of the pad hole, and plays a role in preventing the PCB board from falling off when the PCB board is inverted.
[0036] Embodiment 2
[0037] refer to Figure 1-3As shown, a wire plug-in terminal for preventing falling off on a PCB board comprises a pad hole 4 arranged on a PCB board 1, a connector 3 is installed in the pad hole 4, a copper foil hole ring 5 is arranged around the hole opening of the pad hole 4, the copper foil hole ring 5 is connected to the circuit layer in the PCB board 1, the upper end of the connector 3 is riveted and connected to the wire core 22 of the wire 2 into one body, the lower end of the connector 3 is inserted into the pad hole 4 and connected to the copper foil hole ring 5 on the PCB board 1, the wire 2 is electrically connected to the copper foil hole ring 5 of the PCB board 1 through the connector 3, a barb 31 is arranged at the lower end of the connector 3, the barb 31 extends obliquely to the side of the pad hole 4 and contacts the surface of the PCB board 1, the barb 31 is arranged at the bottom of the lower end of the connector 3, the barb 31 is arranged obliquely outward from bottom to top, and the barb 31 forms an angle with the vertical direction, and the inclination angle of the barb can be controlled by the size of the angle. The included angle between the barb portion and the vertical direction is usually 3-10 degrees, which is larger than the diameter of the pad hole, ensuring that the end of the barb portion is located at the periphery of the opening of the pad hole after assembly.
[0038] In order to save subsequent processing, the barb portion and the connecting device are an integrally formed structure. Moreover, the end of the barb portion is set as an arc end, and the end of the barb portion contacts the bottom surface of the PCB board. By setting it as an arc end face, it is not easy to cause damage to the surface of the PCB board.
[0039] In addition, the barb portion 31 is in the shape of an annular ring wall, that is, a circle of upwardly inclined ring walls is arranged at the lower end of the connector 3 to form a barb portion, so that the lower end of the connector is horn-shaped. The barb portion is in a sheet-like structure, and will bend toward the connector when subjected to external force, thereby not affecting the operation of inserting the connector into the pad hole. The circle wall of the circle can be a solid sheet, or a plurality of opening intervals can be arranged on this basis, so that the barb portion can be better retracted, bent and unfolded when it is squeezed by an external force. When the barb portion forms a top against the PCB board, it is usually not subjected to excessive force, and its own gravity does not cause the barb portion to deform, so that the barb portion has good anti-falling performance.
[0040] Of course, in other structures, in order to meet some specific production and work requirements, the barb portion can also be used as a separate device, assembled and fixed at the lower end of the connecting device by welding or other connection methods.
[0041] Embodiment 3
[0042] refer to Figure 1-3As shown, a wire plug-in terminal for preventing falling off on a PCB board comprises a pad hole 4 provided on a PCB board 1, a connector 3 is installed in the pad hole 4, a copper foil hole ring 5 is arranged around the hole opening of the pad hole 4, the copper foil hole ring 5 is connected to the circuit layer in the PCB board 1, the upper end of the connector 3 is riveted and connected to the wire core 22 of the wire 2 into one body, the lower end of the connector 3 is inserted into the pad hole 4 and connected to the copper foil hole ring 5 on the PCB board 1, and the wire 2 is connected to the copper foil hole of the PCB board 1 through the connector 3. The ring 5 is electrically conductive, the lower end of the connector 3 is provided with a barb 31, the barb 31 extends obliquely to the side of the pad hole 4 and contacts the surface of the PCB board 1, and the upper end of the connector 3 is provided with a horizontally protruding limiter 32, the total width of the limiter 32 and the connector 3 is greater than the diameter of the pad hole 4, the limiter 32 presses the front of the PCB board 1, and the limiter 32 will extend to the periphery of the pad hole 4, and the limiter 32 is used to limit the depth of the connector inserted into the pad hole. After the connector is inserted into the pad hole to a certain depth, when the limiter contacts the front of the PCB board, the connector is restricted and cannot continue to be inserted, forming a stroke limiting effect.
[0043] The limiting part 32 does not need to be arranged around the connecting device 3, which will waste materials and increase production costs. It only needs to be arranged on the side of the connecting device. The specific setting of the limiting part is as follows:
[0044] Only one limiting portion is provided on one side of the connector, and the limiting portion is located on one side of the pad hole, which can also play a role in limiting the depth of the connector inserted into the pad hole. However, since only one limiting portion is provided on one side of the connector, the connector is difficult to maintain balance and tends to tilt toward the side of the limiting portion, which is not conducive to the stability of the structure.
[0045] A better solution is to set a limit part on each symmetrical side of the connecting device, so that the overall structure of the connecting device is relatively balanced. After assembly, the two limit parts are symmetrically distributed on both sides of the pad hole, and together fit and press the PCB board surface on both sides of the pad hole, making the structure more stable and reliable.
[0046] The limiting part and the connecting device are an integrally formed structure, which can be directly manufactured and formed without the need for subsequent processing.
[0047] The lower end of the connecting device extends to a part of the bottom surface of the PCB board, and the distance between the limiting part and the lower end of the connecting device is greater than the depth of the pad hole, so that the lower end of the connecting device extends to the outside from the pad hole, which is convenient for connection and the inverted anti-falling function of the hook part.
[0048] The utility model utilizes a separately arranged connector. When drilling a solder pad hole on a PCB board, there is no need to correspond to the numbers of different wires, that is, there is no need to correspond to wires of different sizes, but only to the size of the connector. A connector of different sizes can be used to assemble and connect wires of different sizes. The wires can be fixed by riveting the connector and the wire core. Then the connector is assembled into the solder pad hole and welded accordingly to achieve electrical conduction between the wire and the circuit layer on the PCB board. The difficulty of assembly is greatly reduced, and the adaptability is improved at the same time. The connector can form a standardized PCB package and improve the design speed of the PCB board.
[0049] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A wire plug-in terminal for preventing it from falling off on a PCB, characterized in that: The invention comprises a pad hole arranged on a PCB board, wherein a connecting device is arranged in the pad hole, a copper foil hole ring is arranged around the hole opening of the pad hole, the copper foil hole ring is connected to the circuit layer in the PCB board, the upper end of the connecting device is connected to the wire core of the wire by riveting and pressing into one body, the lower end of the connecting device is inserted into the pad hole and connected to the copper foil hole ring on the PCB board, the wire is electrically connected to the copper foil layer of the PCB board through the connecting device, and a barb portion is arranged at the lower end of the connecting device, the barb portion obliquely extends to the side of the pad hole and contacts the surface of the PCB board.
2. The anti-dropping wire plug-in terminal on the PCB board according to claim 1, characterized in that: The copper foil hole ring is arranged on the bottom surface of the PCB board, and the lower end of the connecting device is inserted from the front side of the pad hole and extends to the bottom surface of the PCB board and then is welded and fixed to the copper foil hole ring.
3. The anti-dropping wire plug-in terminal on the PCB board according to claim 2, characterized in that: The barb portion is arranged obliquely outward from bottom to top from the side edge of the lower end of the connecting device.
4. The anti-dropping wire plug-in terminal on the PCB board according to claim 3, characterized in that: The barb portion and the connecting device are an integrally formed structure.
5. The anti-dropping wire plug-in terminal on the PCB board according to claim 4, characterized in that: The end of the barb portion is configured as an arc end.
6. The anti-dropping wire plug-in terminal on the PCB board according to claim 1, characterized in that: The upper end of the connecting device is provided with a laterally protruding limiting portion, which is in contact with the front side of the PCB board, and the total width of the limiting portion and the connecting device is greater than the diameter of the pad hole.
7. The anti-dropping wire plug-in terminal on the PCB board according to claim 6, characterized in that: The limiting portion and the connecting device are an integrally formed structure.
8. The anti-dropping wire plug-in terminal on the PCB board according to claim 1, characterized in that: The barb portion is in the shape of an annular ring wall.
9. The anti-dropping wire plug-in terminal on the PCB board according to claim 6, characterized in that: The limiting portion is in a horizontal plate structure.
10. The anti-dropping wire plug-in terminal on the PCB board according to claim 6, characterized in that: The lower end of the connecting device extends to a part of the bottom surface of the PCB board, and the distance between the limiting part and the lower end of the connecting device is greater than the depth of the pad hole.